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Feb. 19, 1929. 1,702,649

L. GEN'I 'ZEN COMPOUND PUMPS OPERATING HEARS Filed July 19. 1922fbventoz' Z/uJwxl Genlzev Allomfy llatentetl Feb. 19, 1929.

it i T E COMPOUND PUMPS OPERATII'KG MI NEAlE-Z ING, AK'IIE bl OVER,GERMANY, ASSIGNOR TO O1 KURTINGSDORF, NEAR Application filed July 19,1922 Serial No. 576,110. and in Germany 1111: 1S, 1921.

This invention has reference to means of operating pumps for thesubstantially simultaneous or closely succeeding punrpmg' and.propulsion ot ditlcrentliquids or lluids which are either immiscible orthe mixing ot which it is desired to avoid. F0) a variety nt irurposesin the arts two ditl'crent l iprids have to be pumped immediatelysucceeding each other or simultaneou ly which are to be lZG-Pll separatefrom each other. This eventuality occurs for example in the case ofmotor engines operated by tar oil or other heavy hydrocarbons, and inthis case a readily in flammable fuel is used for ctl'ectine' ignitionand has to be delivered to the engine bet'ore the tar oil or other heavyhydrocarbon lied to the combustion chamber. Hereto'l ore either twopumps with separate driving means have been used for this purpose, whichresults in great expense and complication for the operation of the twoditlerent pumping means, or the arrangement has been such that a freelymovable piston or plunger has been used reciprocatingly guided in atightly packed bearing or stutlinp; box or the like and one end of whichis .in operative conncction with the compression chamber of a mainpumping engine, while the other end of said piston or plunger was madeto serve as the plunger of an additional pump, so as to produce thesimultaneous pumpingof two ditlerent liquids. These and. similarprevious devices, however. are rather complicated. and are not availablein cases where one of the llqUlllFt or fluids, as in the case abovereferred to. should be delivered some time before the other liquid orfluid.

A device embodying by way of example the principles o't' my invention,and admitting; ot the feeding and the delivery of liquids and fluids inthe required order, and without admixture oi? the same is showndiagrammatically in vertical section view on the accompanying drawing.

The pump cylinder in the example shown in the drawing presents twosectional chambers connected by a suitable passage, preterably axiallydisposed. One of the ections, the left hand section for instance may beof somewhat larger diameter than the other section in accordance withthe nature of the substances to be dealt with. In the form ofconstruction herein shown the left hand section serves for the feedingand propulsion oi the hcavv hydrocarbon, the tar oil for instance by in'18 ot the plunger (r, admission pipe a and the prcssurc dclivcuv valve11, while the right hand scctiou is intended to d al with tlnspecifically light. igniting liquid admitted through the admi on conduit7 and ,cd upon by the piston 0 under the action of a spring if. Upon thedescent of the main pl anger a. which may be operated by a cam disc orequivalent means the left- 1 d section of the pump through the suctionvalve 3) aspirate; the tar oil or the like, 'v-xhilc at the same time inconsequence of the under pressure prevailing in the pump cylinder, andby the spring action of the spring (Z the cart/idly ground piston awhich very closely [its the bore of the corresponding section o t thepump cylinder is moved to the left until it abnts against the shoulderor story 0, so as to allow igniting fluid to be admitted. through thesuction valve By inserting a very strong; spring the tension of which,it desired, may be regulated in the main pressure valve 7t provision maybe made to cause the main pressure valve it to remain closed for a timeupon the upward movement of the main plunger a, while the groulul piston0 is moved towards the right, causing; the igniting fluid to bedelivered to the engine cylinder '11 through the pressure valve 7. ofthc right hand section of the pump cvliinlcr and which is held on itsscat with less spriiur pressure than the valve 72, until the piston cabuts against the right. hand, prctcrably adjustable, stop 1 'l hcnonly, that is to say after the completion of the 1:un1ping ol? theigniting lluid, and closely succeeding the same, the main valve Itopens, and the heavy hydroczu'bon is fed through the valve h and isinjected into the engine 2'.

It is evidcnt that my invention is by no means restricted to use inconnection with engines opera ed with heavy hydrocarbons and the like,but it may be employed wherever two ditlcrent liquids or fluids are tobe dealt with ln'actically' simultaneously or in close succession, andwhile I have described the invention with retorence to one of the mostsimple embodiments thereof, I wish it to be understood that I do notdesire to be limited to the particular shaping, construction andarrangement of parts herein shown and described, but alterations andmodifications both in the arrangement and the construction of

